A.对
B.错
[判断题]A.对B.错
[单选题]A.柔红霉素B.羟基脲C.全反式维甲酸D.干扰素E.瘤可宁
[单选题]A.a=-2,b=2B.a=2,b=-2C.a=-1,b=1D.a=1,b=-1
[单选题]A.B.C.D.
[单选题]A.B.C.2xD.2